code: def forward(self, img):
      *_, h, w, dtype = *img.shape, img.dtype
  
      x = self.to_patch_embedding(img)
      pe = posemb_sincos_2d(x)
      x = rearrange(x, "b ... d -> b (...) d") + pe
  
      x = self.transformer(x)
      x = x.mean(dim=1)
  
      x = self.to_latent(x)
      return self.linear_head(x)
  
imports: import torch
  from torch import nn, einsum
  import torch.nn.functional
  from einops import rearrange, repeat
  from einops.layers.torch import Rearrange
label_desc: Use image node_id 2 for calling the ViT obj's underlying member method code with example usage: obj.forward(img) and returns: self